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  1. SVT output iron as single ended
  2. is 6s2p actually equiv to 8532?
  3. Grundig H&B 6007 tube power supply - Repair or gut for parts?
  4. Quad 22 stereo balance/ filter problem
  5. KR 2A3: problems?
  6. Philco F-1801
  7. KT88 Stereo Schematic and help
  8. Where should I connect ground reference for heater supply?
  9. Chassis size and layout question
  10. May tubes amps
  11. 12SX7 coin base tubes? Fake?
  12. Toroidal transformer on tube amp
  13. Current Mirrors in a balanced preamp
  14. Half-mu stage (or SRPP) w/6DJ8/6922/ECC88 tubes at Low B+ voltage?
  15. High-end Tube amp kits (all-included)
  16. High Current Maida
  17. High Current Maida
  18. Balanced tube preamp schematic or kit?
  19. Trying to find tube component supplier, lost webite ...VT42.com or something like it.
  20. 2A3 PP Can my OPT do the job?
  21. 1626 / 6j4 tube amp
  22. suggestions for driver tube for 2A3
  23. Does anyone know the specs for this Chinese pentode
  24. SiliconRay Kits
  25. Advice needed for hum reduction
  26. low voltage dc tube phase splitter/12AU7
  27. Damper rectifier tubes & voltage doubler
  28. Overheating Resistors on DAC board- "HELP NEEDED"
  29. opt primary inductance and secondary load
  30. SOS-HELP-AIDE-HILFE on " DAC dilema"
  31. Transformer Mounting Direction
  32. HELP! new to working on tube amps and need help with project im going to take on
  33. Fisher 500c radio hum
  34. Modify Power supply for Tube Amp
  35. Unusual amps..
  36. Anyone make a guitar amp from an EA-3?
  37. Help with Preamp/Amp hum
  38. Question about step up in 300B PP amp
  39. How do we reach PMillet?
  40. Please help me with a few questions and a idea for an old PA
  41. nos 5y3wgt in 5e3
  42. Edcor CXSE25-8-2.5K single ended UL transformer
  43. Voltseconds ccs for the K-12 kit
  44. The Torpedo Parafeed Headphone Amplifier
  45. Tube Rectifiers do sound different
  46. 6922, a 6DJ8 replacement??
  47. QB2/250 amplifier
  48. WE 350B and 311A
  49. Single ended 300b's
  50. More power!
  51. How the magnetic affect the sound of tube amplifier
  52. Valves replacement for Copland CT402
  53. Changing valve damage
  54. Tube phono preamplifier by 12ax7
  55. Altec 353A oddity
  56. I need to lose that Hummmm
  57. Reduce B+ with zener
  58. Old Marshall plexi clone problem
  59. triode and pentode 6v6 in parallel
  60. How to make mic input transformer 150:50KCT for mic tube preamp???
  61. Webcor 12AU7 is it a Mullard?
  62. Everett AO48
  63. Resurrecting old tubes
  64. Lumley ST70 Output impedance change and other questions
  65. AC Heater reference to B+
  66. Two tube class a2 se trioded el84 with 12dw7 cathode follower driver?
  67. Overly complicated 1.6A CCS Heater Supply
  68. Hibryd amplifier with tube/valve ECC88 (PCC88) and chipamp LM1875
  69. Tube/Valve buffer with ECC88
  70. High(er) gm octal pentodes?
  71. Shielding Characteristics of Copper Clad PCB
  72. Starting a Meixing MC34-A07 modification project
  73. 6V SLA Dropping resistor for a 5VDC Filament Supply
  74. Wind (Thermionic?) noise, and other strange sounds
  75. Suggestions for an tube-amp with KT88
  76. SE-100 Golden Tube Audio - REPAIR
  77. Power amp vs preamp topology
  78. EL34 Characteristics for Ug2 400V
  79. old Heathkit amp
  80. Toroid OPT for 300B
  81. Help: Connecting two Fluke meters in series
  82. Preamp Volume Controls
  83. Output SE Transformer Question
  84. Vintage electrolytic capacitors
  85. Silver bearing grease for tube sockets
  86. Should I try adding a small Tube Preamp to a DTA-100?
  87. IS 6N6P A DIRECT REPLACEMENT FOR ECC88CC ?
  88. Dynaco stereo 70 look alike
  89. Vacuum Tube factory: For Sale!
  90. Does anybody know anything about this German console
  91. Heater dillema for multi chassis phono stage.
  92. Q: lifespan of JJ ECC99 tubes
  93. Cold solder joint?
  94. Input Impedance/Buffers
  95. Old capacitors..Comments..
  96. Shizuki capacitors?
  97. Spectrum Analyzer: What to get ? What to look for in a spectrum analyzer ?
  98. Amperex Orange Globe 12ax7 ,Brimar cv4004
  99. Question about transformer lamination stacking techniques
  100. line preamplifier with 6c10
  101. Homebrew Toroidal Output Transformer
  102. Line output tube
  103. MJK's SSSchadeode
  104. Any one know were to buy the fu-80 tube?
  105. Maida Regulator PCB
  106. Suggestions for 7k output transformers.
  107. Help: Fluke 87V Meter Calibration
  108. Searching for Primaluna Prologue Three schematic
  109. JCM Build - Hum and Crackle
  110. Silvertone radio to Guitar Amp conversion question.
  111. Pentode Regulation Question
  112. pentodes with CCS load?
  113. Are these tube PCBs any good ?
  114. china 6L6 SEdiy
  115. What are your opinions of the ST-70 and St-120
  116. Baffle Step Compensation Tube Circuit
  117. 6L6 to 7027 cathode resistor value
  118. PCB to mount snapmout electrolytic capacitors
  119. Dared MC-7P Upgrades
  120. adapter to go from 6L6 to 807
  121. My Experience with a Jolida 202s (SoFar..)
  122. Cathodyne gain calculator link
  123. Dynakit ST-35?
  124. PSUD modeling old amp PS fails.
  125. Fisher 800 push-pull output stage not symmetrical. Why?
  126. Question of D3a driving 300B
  127. old console amp
  128. st35 vs millett DCPP vs tubelab simple SE
  129. New Tim Mellows OTL project
  130. Melted my mains transformer - Where to find replacement ?
  131. Strange.................
  132. Effect of high mains voltage?
  133. Kent SL 21 Tube head need help!!
  134. Hexfred or SIC rectifiers in choke supplies
  135. 'Strange' bass boost with impedance transformer
  136. Did my tubes go south ?
  137. Use of Tango NN-600-600 Transformers ?
  138. Anyone have an explanation for break(burn)in
  139. The Right Tube & TRannie
  140. 6SL7 / 6SN7 Phono
  141. Tube integrated amp in China.
  142. Power supply issues with Borbely style 12AU7/MOSFET hybrid
  143. heater elevation ground point
  144. Edison 12, can anyone help?
  145. Delay B+ using relay?
  146. New Schematic Linestage Tube Preamp using EF86 & 12AX7
  147. Phonostage (WAD clone) and 12B4A Preamp Build
  148. Interstage coupling feedback
  149. Just received a Yaqin MC-10T and have a couple of questions.
  150. Amplifier Troubleshooting
  151. Audio Preamplifier with PCC88
  152. Need Help With These TriodeDick Preamp Scematics
  153. I need help with my amp project
  154. Looking for unbalanced to balanced transformer
  155. Power Transformer Question
  156. My First Tube Amp Project S5 K-12G
  157. 6E2 vacuum tube compatibility
  158. Tube condenser microphone help!
  159. Audio transformer feedback loop
  160. yaqin vk amp without the loudness button uk version
  161. PP driver stage with local feedback
  162. Leader LAG-120B Audio Generator Manual Wanted
  163. Transformer brand question
  164. Single ended at 24Vcc 1+1W @ 8 ohm - three tubes
  165. EL41 PP power supply questions
  166. Reduce output on a ECC88CC class A pre-amp !
  167. SE OT impedance question
  168. DIY Tube amp book?
  169. 6P6P tubes?? will 6V6's work?
  170. RH84 amplifier build, but very weak distorted output
  171. Paralleling filament transformers
  172. 6ak5 triode mode disipation
  173. Equalize or Not Equilize when driving a tube amp ?
  174. How to retire from DIY and sell off all your workshop contents?
  175. New to tubes and diyaudio here, question about torrids and tube amps...
  176. PC Based Oscilliscope for Tube Curcuits
  177. Lamp in HV Centre Tap - why?
  178. EL156 PP
  179. 300B resistor
  180. Has anyone here bought from ussr-tubes.com ?
  181. Which cathode bypass capacitor?
  182. RIAA Schematic for-6SL7,7308 or?
  183. Chassis' for Tube Gear
  184. Convergent Audio Tech SL1 preamp
  185. Buy Them While You Can Not When You...
  186. Does anyone know of Thomas Martens?
  187. OTL for 40-80ohm speakers
  188. Morrison Dinosaur
  189. pcl86=14gw8 ??
  190. My little SE with GU50
  191. Source follower in a DC-coupled pp amp?
  192. Tube chassis for retail sale.
  193. Poor man's power supply
  194. High voltage driver for AB2 operation GU81m tubes
  195. 5AR4 rectified power supply question
  196. Direct Coupled Amp
  197. Is this EL84 kit from Germany worth fooling with?
  198. 6v6 PP Pentode mode
  199. 5 pin octal tube socket
  200. RCA Manual Typo?
  201. pete millet low mu preamp
  202. Capability to drive the 211 PP
  203. 6BG6G SE advice needed.
  204. Signal Generator: Which one to buy ? What to look for in a signal generator ?
  205. Power booster
  206. I've just build this steroe amplifier
  207. What amp to build? Push Pull, SE? thoughts?
  208. amp sounds bad- fatman itube 252
  209. 6C33 single ended class A2 (cathode network question)
  210. Sweet Peach EL34b Amp - Distortion?
  211. 6C33C socket types, where to buy?
  212. haedphone amp. using 6418< NEED HELP
  213. finished my 6au6/807 amplifier
  214. Thinking about building an S5 16LS 16W amp I've got some questions for the forum./
  215. Broskie "Unbalancer" - transformer specifications
  216. Tube chess.
  217. How Its Made - Vacuum Tubes
  218. Please help me understand power supply load
  219. 12AU7 - How absolute are maximum ratings?
  220. Tube rejuvination
  221. Article: Samsung brings back tubes in audio dock
  222. 1st build suggestions
  223. Parallel SE output
  224. Fixed Bias question
  225. vintage ua 610 schematic
  226. Which KT88 PP and which Transformers?
  227. Some more special small-signal tv tubes
  228. MR 67 Coupling Caps
  229. Help - YAQIN MS-20L schematic
  230. Power and Speaker cables
  231. v1 tube keeps going microphonic help! 5e3 build
  232. Leak TL12+ with triode mode EF86
  233. diy tube dampers
  234. VTVM troubleshooting help
  235. PP amp crossover distortion
  236. Sanity check please? ST-70(-ish) power supply
  237. Thoughts of apparent noise on ground - due to power tx?
  238. hybride circlotron
  239. Clone
  240. 8156 Beam Pentode Compactron
  241. DOUBLE TRIODE (6N16B)
  242. looking for Tube I/V analog for dac schematic ?
  243. NewBee PPEL84
  244. Whooaa! Now we're talking.
  245. Cinema Engineering AT-18
  246. Back from school
  247. Amp ideas for my spare 3.3k output transformers.
  248. HEllo and a few suggestions please
  249. 1SH24B Pre-Amp (or buffer?)
  250. Anode cap for GU 29 / QQE06/40

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